Scientific Inquiry & Diversity of Life — Chapter quiz · Life Science & Scientific Inquiry, Grade 7
Five focused units, a three-session investigation, chapter review, and chapter quiz.
Problem 1
Answer and explanation
It may represent real variation or reveal a problem worth investigating. Removing it only because it disagrees with a prediction biases the evidence.
Problem 2
Answer and explanation
No. Repetition does not remove the linked light difference. Redesign the comparison so light is comparable, and use independent seedlings with recorded starting sizes.
Response criteria
- Explain the relevant biological process accurately.
- Use the supplied evidence and show calculation steps with units where needed.
- Connect a labeled model or mechanism with the claim.
- State an assumption, evidence limitation, or useful next observation.
Problem 3
Answer and explanation
Its estimated length is 50 micrometers, assuming the bar belongs to that image and both are measured in the same direction.
Problem 4
Answer and explanation
No. The bar no longer has the same image-to-specimen relationship. Resize it with the image or provide a new valid calibration.
Response criteria
- Explain the relevant biological process accurately.
- Use the supplied evidence and show calculation steps with units where needed.
- Connect a labeled model or mechanism with the claim.
- State an assumption, evidence limitation, or useful next observation.
Problem 5
Answer and explanation
No. Different combinations of measurements can average 5 cm. Inspect the original values and their spread.
Problem 6
Answer and explanation
No. Other conditions such as soil, species, light, and initial size may differ. A causal explanation needs a plausible mechanism and comparisons addressing alternatives.
Response criteria
- Explain the relevant biological process accurately.
- Use the supplied evidence and show calculation steps with units where needed.
- Connect a labeled model or mechanism with the claim.
- State an assumption, evidence limitation, or useful next observation.
Problem 7
Answer and explanation
A legend explains what symbols represent so readers can distinguish meaningful relationships from invented display choices.
Problem 8
Answer and explanation
No. Revising a model in response to accurately recorded evidence is part of science. Concealing or inventing observations would be a different problem.
Response criteria
- Explain the relevant biological process accurately.
- Use the supplied evidence and show calculation steps with units where needed.
- Connect a labeled model or mechanism with the claim.
- State an assumption, evidence limitation, or useful next observation.
Problem 9
Answer and explanation
Yes. Bacteria and other prokaryotes lack a membrane-enclosed nucleus but carry genetic material and perform cellular processes.
Problem 10
Answer and explanation
No. Those two categories do not exhaust biological diversity. Fungi have their own characteristics; combine cell features, nutrition, and relationship evidence rather than forcing a two-category choice.
Response criteria
- Explain the relevant biological process accurately.
- Use the supplied evidence and show calculation steps with units where needed.
- Connect a labeled model or mechanism with the claim.
- State an assumption, evidence limitation, or useful next observation.